What Floyd Mayweather wants is not always what he gets.

The Nevada State Athletic Commission has put the brakes on his plan to change the glove size for his upcoming showdown with UFC superstar Conor McGregor.

The two fighters are set to collide at the junior middleweight limit of 154-pounds - which under the Nevada rules would call for 10-ounce gloves.

McGregor claimed in several interviews that Mayweather intentionally wanted the junior middleweight limit, because 10-ounce gloves are used above the welterweight limit of 147. The MMA fighter is used to wearing 4-ounce gloves in the UFC.

Mayweather was under the impression that if both fighters were able to contractually sign off on a rule change, the Nevada Commission would allow it.

"Don't believe what you hear in the media. Don't believe what you hear on blog sites. If it's not coming directly from me, then it's not true. I'm telling McGregor, 'Let's fight in 8 oz gloves.' McGregor can fight in any brand he prefers or chooses. I'll be wearing 8 oz Grant gloves. Whatever advantage McGregor needs to feel more comfortable in the ring, I'm willing to accommodate. Let's give the boxing and MMA fans what they want to see," Mayweather stated.

What Mayweather believes is not the case.

According to Nevada Commission executive director Bob Bennett, they are not going to bend the rules for the Mayweather-McGregor contest - regardless if the two fighters agree in writing - and both athletes will be required to wear 10-ounce gloves.

"These regulations are in place for the health and safety of the athletes, which is of the utmost importance to the commission," Bennett told ESPN. "Our regulations already outline the appropriate glove size according to contracted weight of a fight."

Mayweather vs. McGregor takes place on August 26th from the T-Mobile Arena in Las Vegas. Showtime Pay-Per-View in the United States and Sky Sports Box Office in the UK will carry the fight.